Rope sling



R. F. JOY

ROPE SLING Nov. 5, 1946.

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ROPE SLING Nov. 5, 1946,

Filed Feb". 29, 1944 2 sheets-sheet 2 I Mm MN Sw MVN WBN Patented Nov.5,i 1946 ROPE SLIN G Robert F. Joy, Bethlehem, Pa., assgnor to yBethlehem Steel Company, a corporation 0f Pennsylvania ApplicationFebruary 29, 1944, Serial No. 524,497

16 Claims. (Cl. 87-8) This application is a continuationin part of myco-pending application Serial No. 459,155, led September 21, 1942, nowPatent No. 2,359,424, covering Improvements in a rope sling.

My invention relates to rope slings and to a method of making them.

Oneof the objects of my invention is to provide a method of forming awire rope sling from an endless unit.

Another object of my invention is to provide a method' of forming amulti-part wire rope sling from a wire rope strand spliced to constitutean endless unit.

Another object of the invention is to provide a sling of great liftingcapacity and high tensile strength.

Another object of my invention is to provide a non-spinning, non-kinkingsling which has great flexibility.

The novel features of my invention will be more fully understood fromthe following specification and claims, taken with the drawings, inwhich:

Figure 1*'is a plan view showing diagrammatically a rope foldedpreparatory to interweaving a six part sling by my novel method;

Figs. 2. 3 and 4 are plan views showing diagrammatically the steps of mynovel method of interweaving a sixvpart sling;

Fig. 5 is a plan view of a section of a six part sling made inaccordance with my invention:

Fig. 6 is an end view ofthe six part sling shown in Fig. 5;

Fig. 7 is a plan view showing diagrammatically a rope folded preparatoryto interweaving an eight part sling by my novel method;

Figs. 8, 9, 10, 11, 12, 13 and 14 are plan views showingdiagrammatically the steps of my novel method of interweaving an eightpartv sling; and

Fig. 15 is a plan view of a section'of an eight part sling made inaccordance with my invention.

Referring now more particularly to Figs. 1 to 4,

inclusive, of the drawings, I show a rope in the various stages of beinginterwoven into a six part sling. An elementary strand is folded uponitself to provide six body members 2|, 22, 23, 24,

The free ends 32 and 33 can be spliced together as shown in dotted linesin Fig. l either before the start or at the finish of the making of thesling. Seizing is applied preferably to the endhaving the two free endsor splice, or instead of seizing, the spliced end may be passed over aneyeforming block. Interweaving is started by rotating center loop 28 ina clockwise direction, body v4 25, 26 and three loops 21, 28, 29, at oneend, and 5 two loops 38 and 3| and two free ends 32 and 33.

member 23 overlaying body member 24, and passing it through rightoutside loop 29 as shown in Fig. 2. This step positions loop 29 in thecenter whereupon it isv rotated in a counter-clockwise direction, bodymember 26 overlaying body member 25, and passed through left outsideloop 2`| as shown in Fig. 3. This step positions loop 2l in the centerwhereupon it is rotated in a clockwise direction', body member 22|overlaying body member 22, and passed through right outside loop 28 asshown in Fig. 4. Each loop as it becomes the center loop ,is twistedeither in a clockwise or counter-clockwise direction, whichever isAoppositev tothe twist imparted in the previous operation, and is passedeither through the loop to the right or left, whichever direction isopposite to the direction of passing of the previous operation. Thisprocedure is continued until just enough of the loops remain to formeyes.

Referring now more particularly to Figs. 7 to 14, inclusive, of thedrawings, I show arope in the various stages of being interwoven into aneight part sling. An elementary strand 34 is folded upon itself toprovide eight body members 35,' 36, 31, 38, 39, 40, 4| and 42 with fourloops 43, 44, 45, and 46 at one end, and three loops 41, 48 and 49 andtwo free ends 50 and 5| at theother end.. It should be noted that notwisting of the separate loops is employed prior to interweaving. Thefree ends 50 and 5| can be spliced together as shown in dotted lines inFig. 7 either before the start or at' the nish of the making of thesling. Temporary seizing may be applied preferably near the end havingthe two free ends 50 and 5| or` splice to position the loops in theirproper relationship. Instead of applying seizing, the splice end may bepassed over an eye-forming block and secured thereto by means of wiresor other locking means which pass through holes in the block.

Preferably, interweaving is started by twisting the right center loop 45in a clockwise direction so that body member 39 overlays body member 40and then passing loop 45 through the outer righthand loop 46. This stepis shown in Fig. 8, loop 46 being now the right center loop. .Loop 46 isY and loop 43 is passed through loop 46, loop 46 now f being the outerleft-hand loop,`this step being shown in Fig.V 10. It will be noted thatloop 46, i

the original outer right-hand loop has straddled the rst loop to itsleft, passed through the next loop, and straddled the last loop tobecome the outer left hand loop. This procedure is repeated, that is,the outer right-hand loop is alternately passed over and through theadjacent loops until it straddles the oppositely twisted left outsideloop when it becomes itself the outer left-hand loop, acounter-clockwise twist being imparted to it after it passes over thefirst center loop and after it passes through the second center loop. Itwill be seen, upon reference to the drawings, that the body members ofthe loops are alternately divided and paired by the `other loops andthat after being divided and prior to being paired each loop is given atwist; and that the twist is in one direction when the loop travels fromright to leftand is in the other direction when the loop travels fromleft to right. This procedure of twisting serves to lock the loops onewithin the other and by reversing the twist there will be no tendency inthe finished sling to twist upon itself and the loops will remain freeof twistV throughout weaving. This process is continued until a pointhas been reached where just enough of the loops remain to form eyes. Theend loops or eyes are fastened together preferably with ne wire servingwhichbinds them in a compact form' and makes a single loop into which athimble may be inserted. v

My method of forming slings by passing a loop through 'an adjacent loopwill produce a sling in which each member of all loopswll be effectivelylocked against a member of an adjacent loop.

While I have shown my invention in a plurality of forms, it will beobvious tothose skilled in the art thatit is not so limited, but issusceptible of various other changes and modications without departingfrom the spirit thereof, and I desire, therefore, that only suchlimitations shallbe placedthereon as are imposed by the prior art or asare specviically set forth in the appended claims.

Having thus described myl invention, what I claim as new and desire tosecure by Letters Patent is:

l. The method of producing a multi-part flexible sling which comprisesfolding an elementary strand to form a plurality ofloops, passing a rstloop througha second loop, and then passing said second loop through athird loop.

` 2. The method of producing a multi-part flexible sling which comprisesfolding an elementary strand `to form an outside loop, a center loop andanother outside loop, passing said center loop through said firstmentioned outside loop,. and then' passing said first mentioned outsideloop through said other outside loop.

3. Themethod of producing a multi-part flexible sling which comprisesfolding an elementary strand to'form a plurality of loops, twisting aloopand passing it through a second loop, twisting said second loop in adirection opposite to that of said first mentioned loop and passing saidsecond loop through a third loop. f

4. The method of producing a multi-part ilexible slingwhich comprisesfolding an elementary strand'to form a left outside loop, a center loopand a right outside loop, twisting said center loop clockwise andpassing it through said right outside loop, twisting said right outsideloop counter-clockwise and passing it through said left outside loop,and twisting said left outside loop clockwise and passing it throughsaid center oop.

5. The method of producing a multi-part ilexible sling which comprisesfolding an elementary strand to form a left outside loop, a center loopand a right outside loop, twisting said center loop clockwise andpassing it through said right outside loop. twisting said right outsideloop and passing it through said left. outside loop, and twisting saidleft outside loop in a direction opposite to that of said right outsideloop and passing said left outside loop through said center loop.

6. The method of producing a multi-part exible sling which comprisesfolding an elementary strand to form a left outside loop, a left centerloop, a right center loop, and a right outside loop, passing said rightcenter loop through said right outside loop, passing said right outsideloop through said left center loop, and passing said left outside loopthrough said right outside loop.

'7. The method of producing a multi-part flexible sling which comprisesfolding an elementary strand to form a left outside loop, a left centerloop, a right center loop, and a right outside loop, twisting said rightcenter loop and passing it through said right outside loop, twistingsaid right outside loop and passing it through said left center loop,and twisting said left outside loop and passing it through said rightoutside loop.

8. The method of producing a multi-part flexible sling which comprisesfolding an elementary strand to form a left outside loop, a left centerloop, a right center loop, and a right outside loop, twisting said rightcenter loop in a clock# wise direction and passing it through said rightoutside loop, twisting said right outside loop in a counter-clockwisedirection and passing it through said left center loop, and twistingsaid left outside loop in a clockwise direction and passing it throughsaid right outside loop.

9. A flexible multi-part sling formed from a single elementary strand,said sling comprising a plurality of interwoven loops, eachof said loopscomprising two body members alternately divided and paired by bodymembers of adjacent loops alternately disposed intermediate said dividedportions and around said paired portions.

10. A flexible multi-part sling formed from a single elementary strand,said sling comprising three. interwoven loops, each of said loops havingtwo body members alternately divided and paired by the body members ofadjacent loops.

11. A flexible multi-part sling formed from a single elementaryvstrand,said sling comprising four interwoven loops, each of said loops havingtwo body members alternately divided and paired by the body members ofadjacent loops.

12. A flexible multi-part sling formed from a single elementary strand,said sling comprising a plurality of interwoven loops, each of saidloops comprising two body members alternately di. vided and paired bybody members of adjacent loops alternately disposed intermediate said divided portions and around said paired portions and said body membershaving a twisted portion adjacent said divided portion.

13. A fiexible multi-part sling formed from a single elementary strand,said sling comprising three interwoven loops, each of said loopscomprising two body members having alternate divided portions and pairedportions, body members of adjacent loops passing through said dividedportions and passing around said paired portions and said body membershaving a twisted portion adjacent said divided portion.

14. A exible multi-part sling formed from a single elementary strand,said sling comprising four interwoven loops, each of said loopscomprisingtwo body members alternately divided and paired by bodymembers of adjacent loops, each` of the adjacent loops alternatelypassing through a divided portion of the body members of a. loop andaround a paired portion of the body members of a succeeding loop, andsaid body members having a twisted portion adjacent each of said dividedportions.

15. The method of producing a multi-part flexible sling comprisingfolding an elementary y said series of loops.

ROBERT F. JOY.

